Non-fines concrete is a type of concrete with high permeability and it’s mainly used in drainage structures. The De’an water district applied the non-fines concrete in the revetment of small reservoir downstream damslope as a replacement of grass cover, making the construction process easier and the slope more clean and tidy, which especially reduces the workloadof dam surface maintenance. Hence the non-fines concrete was widely promoted in the revetment of downstream damslopein small reservoirs.